Question

NASA is designing a mission to explore titan,
the largest moon of Saturn. Titan has numerous hydrocarbon lakes
containing a mix of methane and ethane in unknown
proportions. A small submersible vehicle will exlpore Kraken Mare,
the largest lake. Assuming maximum depth od the lake is
less than 400 meters how much pressure in
atmospheresmust the submersible
be designed to withstand? Assume surface tension is 147
kilopascals, surface temp is 94 Kelvin and gravity is 1.35 m/s^2
.

The specific gravity of liquid methane is
0.415 and specific gravity of liquid ethane is 0.546